[QE-users] meaning "Note: The following floating-point exceptions are signalling"

[tahsin özer]

Dear Quantum Espresso Users,


Why does the message


"Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG IEEE_DENORMAL"


appear at the end of calculations made with quantum espresso? and What does this message mean?


Thanking you,
Yours sincerely,
Tahsin

****************input file******************************************
&CONTROL
    calculation = 'scf',
    prefix = 'SbSeI',
    pseudo_dir='./',
    tstress=.true.,
 /
&SYSTEM
    ibrav     = 8,
    celldm(1) = 16.34613749,
    celldm(2) = 1.2,
    celldm(3) = 0.47630058,
    nat       = 12,
    ntyp      = 3,
    ecutwfc   = 60,
    ecutrho   = 180,
 /
&ELECTRONS
    mixing_beta = 0.7,
 /

ATOMIC_SPECIES
 Sb 121.76     Sb.pbe-hgh.UPF
 Se 78.96      Se.pbe-hgh.UPF
 I  126.90447  I.pbe-hgh.UPF

ATOMIC_POSITIONS (crystal)
Sb 0.1180000  0.1300000  0.2500000
Sb 0.3820000  0.6300000  0.7500000
Sb 0.8820000  0.8700000  0.7500000
Sb 0.6180000  0.3700000  0.2500000
Se 0.8350000  0.0600000  0.2500000
Se 0.6650000  0.5600000  0.7500000
Se 0.1650000  0.9400000  0.7500000
Se 0.3350000  0.4400000  0.2500000
I  0.5150000  0.8250000  0.2500000
I  0.9850000  0.3250000  0.7500000
I  0.4850000  0.1750000  0.7500000
I  0.0150000  0.6750000  0.2500000
K_POINTS (automatic)
  4 4 10 1 1 1

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